SMTP sample exchange

Because I always forget, here's how to manually send a mail given a telnet client and an SMTP server in order to test and make sure the server's working:

$ telnet mail.example.com 25
Trying 12.34.56.78...
Connected to mail.example.com (12.34.56.78).
Escape character is '^]'.
220 mail.example.com ESMTP Ready on Mon, 21 Mar 2005 16:29:31 -0800 [a.mail]
HELO mail.somewhere.com
250 a.mail.somewhere.com Hello 98.76.54.32.somewhere.com [98.76.54.32], pleased to meet you
MAIL FROM:<mike@somewhere.com>
250 2.1.0 <mike@somewhere.com>... Sender ok
RCPT TO:<someone@example.com>
250 2.1.5 <someone@example.com>... Recipient ok
DATA
354 Enter mail, end with "." on a line by itself
Hello there!
OK, bye!
.
250 2.0.0 0987654321 Message accepted for delivery
QUIT
221 2.0.0 a.mail.example.com closing connection
Connection closed by foreign host.
$